Telephone-repeater



' W. ANDERSON.

TELEPHONE REPBATER.

APPLICATION FILED 110v. 12, 1909.

997,594. Patented'July 11,1911.

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UNITED STATES PATENT OFFICE.

WILLARD ANDERSON, OF LONGDALE, OKLAHOMA.

TELEPHONE-REPEATER.-

Specification of Letters Patent.

Patented July 11, 1911.

Application filed November 12, 1909. Serial- No. 527,752.

To all whom may concern:

Be it known that I, WILLARD ANDERsoN,

I a citizen of the United States of America, -'residing at Longdale, in the county of Blaine, in the State of Oklahoma, have invented certain new and useful Improve -ments in Telephone-Repeaters whereof the following is a 'specification' This invention relates to telephone repeaters for long distance telephone. lines. The object of the invention is to provide a simple device automatically operative in.

either-direction of transmission for amplifyingor reinforcing the current vibrations so that messages may be delivered at either end of the line in full and distinct volume. I

The drawing is a diagrammatic figure 'representing the invention or one'embodiof-the telephone circuit is severed and the.

secondary of saidinductorium. The

ment thereof in operative connection with a telephone line or circuit. i v In'the form represented the line wire 100 tion, say fromleft to right as illustrated in the drawing, the binding post 1 constitutes the positive or leading-in terminal of the repeaterand the binding post 28 the negative'or leading-out terminal thereof; while for messages passing from right to left the I binding post 28 is the positive or leading-in terminal and the binding post 1 the negative or-leading-out terminal. This repeater in the form shown comprises two receivers, two transmitters in operative juxtaposition re-- spectivelywith said receivers, two batteries two induct'oriums and connections substan tially as hereafter described. A wire 2 connects the binding post 1 with a wire 3 at the point 4; The wire 3 is connected on one side of the point '4 at one end with the negative pole 9 of a battery Hand on the other side of said point with the primary coil 5 of an inductorium, the coil 12 representing the 1'1? mary-5 and secondary 12 are preferably. c imnected in shunt by the wire 3*, which may form an extension of wire-3L A wire 6 connectsthe opposite end of the primary- 5 with a transmitter 7 and a wire 8 connects said transmitter with the positive pole 10 of A wire 13 connects the op-- posite end of the secondary coil 12 of said inductorium with a receiver 14 and a Wire the battery 11.

15 connects said receiver with another re ceiver 16. -A wire 17 connects said receiver 16 with one end of a secondary coil 18 of another 'inductorium. A primary coil 19 of the second inductorium is connected. by awire 20 with a transmitter 21 and a wire 22 connects said transmitter with the positive pole 23 of abattery 29. A wire 25 connects the negativepole 24 of said battery at the point 26 with a wire 27 and the latterconnects the wire 25Qwith' the terminal 28. The

opposite ends of the coils 18 and 19 are preferably connected with each other and with the wire 27 by an extension 25 ofthe wire 25. The receiver 14 is in operative. juxta;

"position with the transmitter 21 and the receiver 16 is in operative juxtaposition with the transmitter 7 Microphone transmitters and sensitive receivers are used and'a new vibration is made in either direction which 'har'monizes with the original vibrations in the circuit. In long lines or circuits..a,-pl urality of repeaters may be employed;

The common inductoriums may be used, but Iprefer to use inductoriums in which the primaries and secondaries are shunted together so as to increase the inductive power." f

I claim as'm'y'invention:

1. The combinat-ion'with a telephone circuit of a repeater serially disposed insa'id circuit and automatically operative in either direction of transmission and comprisingtwo transmltters, two receivers disposed in inductoriums," the transmitters being conuxtaposition 'to said transmitters 'andtwd nected respectively with the primaries ,of

said inductoriums-and the receivers being connected respectively directly with each, other and with oppositesecondaries of said inductoriums.

cuit of a repeater serially disposed in said circuit and automatically operative. ineither direction of transmission and comprising two transmitters, two receivers disposed in operative juxtaposition to saidftransmitters' and two inductoriums, the transmitters being connected respectively; with the primaries'ofsaid: inductoriums, the ends of the primary 2. The combination with a telephone cir- 1 connection.

and secondary of each induc'torium being in 3. The combination of a telephone circuit and a repeater serially disposed in said circuit and automatically operative in either direction oftransmission for reinforclng the.

wave vibrations, said repeaters comprising two microphone transm1tters, two sensitive receivers dlsposed 1n cooperative relation to said transmitters respectively and two inductoriums, the transmitters being condue tively connected respectively with the prim'aries oftsaid inductoriums and-the receivers being condnctively connected respectively with each other'and with opposite secondaries of said inductoriums.

4. The combination of a telephone circuit and a repeater serially disposed in said circuit and automatically operative in either direction of transmission for reinforcing the wave vibrations, said repeater comprising two microphone transmitters two sensitive receivers disposed in cooperative relation to said transmitters respectively and two inductoriums, the transmitters being conductively connected respectively with the primariesof said inductoriums and the receivers being conductively connected respectively with each other and with opposite secondaries of said inductoriums, and batteries connected with said coils. I 5. Thecombination of a telephone circuit and a repeater serially disposed in said circuit and automatically operative in either direction of transmission for reinforcing the wave vibratio'ns, said repeater comprising two microphone transmitters, two sensitive receivers disposed in cooperative relation to said transmitters respectively and two inductoriums, the transmitters being conductively connected respectively with the primaries of saidinductoriums and the receivers being conductively connected respectively with each other and with opposite secondaries of said inductorinms, and a battery disposed in a loop containing one of said transmitters and one of said primaries.

6. The combination of a telephone circuit and a repeater serially disposed in saidcircuit and automatically operative in either direction of transmission for reinforcing the wave vibrations, said repeater comprising two microphone transmitters, two sensitive receivers disposed in cooperative relation-to said transmitters respectively and two induction coils, the transmitters being cons ductively connected respectively with the primaries of said induction coils and the receivers being conductively connected respectively with each other and Withopposite secondaries of said'inductoriunis, a battery disposed in a loop containing one of said transmitters and-one of said primaries, another battery disposed in a loop containing the other transmitter and the other of said primaries. r V

WILLARD ANDERSON V Witnesses; I I). A. HENDERSON,

' F. A. WHITAKER.

Copies ofthis patent'may he obtained for me cents each, by addressing Washington, 1). G.

the Commissioner of Patents, 

